Transfer medium for metallizing purposes



May 3, 1927. w. F. GRUPE 1,627,088

TRANSFER MEDIUM FOR METALLIZING PURPOSES Filed AUI. 20. 1925 il. v

HEAT RELEASABLE MAERIAL SIZING BRONZE POWDERl CELLULOSE HEAT RELEASABLE MATERIAL vslzme NTOR 5M ATTORNEY.

Patente-cl May 3, 19,27.

UNITED- sT-ATEs WILLIAM l'. GBUPE, OF LYNDHURST, NEIMJ'ERSEY.-

1,627.088 PATENT OFFICE.

TRANSFER MEDIUM FOR METALLIZING PURPOSES.

Application illed August 20, 1925. Serial No. 51,364..

This invention relates to transfer media for metallizing purposes. l

Pursuant to my invention, the usual pa er carrier in a sheet or roll form is 'provi ed with a layer of metallic particles which is disposed between heat releasable material. In accordance with my invention, upon the passing of the transfer sheet or strip through the tipping or other impression machine, the provision ofthe heat releasable 'material on the opposite sides of the metallic particles serves to greatly improve the transfer of the metallic particles from the transfer medium to the article impressed both in cleanness of the outline and solidity of the body ofthe impression.

The heat releasable -material serves as a coating on the, individual bronze or other metallic particles to prevent tarnishing or other deleterious effect and maintains the brilliancy or tone lof the metallic particles.

Further advantages are `attained by my invention as will be more clearly understood from the following detail descriptionfand the accompanying drawings,l in which- Fig. 1 is a perspective) view showing diagrammatically a vtransf/er medium embody lin m invention' and Fig. 2 is a diagrammatic view of another form of my invention.

Referring to Fig. 1 of the paper carrier 10 may be of any approved form such as glassine paper, which by its manufacture possesses a highly smooth face. On the vface of the paper carrier, pursuant Ato my invention, a layer of heat releasable material 11 formed of -a suitablewaxy conj stitl'lent, preferably with rosin or 'other resin, is applied. The heat releasable material may be applied to the face of the glassine paper by means of a feeding rol] .liquify the material.

pursuant to the practice as set forth in my previous applications. The bath of the heat releasable material is heated to nsuitably After the application of theheat releasable material to the paper,

the heat releasable material is allowed to be-v come ,hard upon cooling.-

Upon the hardened layer 1l Iof heat releasable material bronze or other metallic particles 12 are applied ifi any desirable manner. I prefer to apply the metallic particles by means of a vehicle of a suitable vaporizable medium, whereby the metallic articles are positioned on theheat releasable material as a very thin layer.

drawings, thev I also prefer to combine a soluble cotton. with the metallic particles, such as acetyl cellulose, nitrocellulose, ammoniated cellulose and the like, -or`mixtures of the same. In such cases, I employ amyl acetate -nr the like as the vaporizable vehicle for the metallic particles as well as a solvent for the soluble cotton. The deposited coating containing'metallic particles is then permitted to dry and above character, as in the employment of an impression machine for tipping, stamping and like operations, the transfer medium is fed with its paper carrier in contact with the die. The book cover, silk or othei` article fed by the operator on the platen of the impressionmachine, is brought into con tactwith the transfer medium on the paper carrier. The die is heated by an electrical mum temperature determined by the coustituency of the heat releasable material.

The presence of the heat releasable material on the opposite sides of the metallic particles serves to present the metallic particles instantly for transferring pur oses without undue flow of the transfer me ium, and a clean and completely filled-out im resvsion is derived. The constituency o the transfer medium also has the advantage of guick cooling and hardening after the trailser operation, which advantage combined with the advantage above vnamed of ready release, enables the speed of the impression machines to be increased under optimum conditions. The layer. of heat-releasable material which is disposed on the transfer roll strip-between the metallic layer and the paper carrier becomes during the heat transfer operation disposed outwardly of the metallic layer and servesas the protective coatingY for the metallic layer; by reason of its resinous content it shields the metallic layer to a high degree against moisture and other substances encountered in the use heater or other suitable. means to the opti.

of the article impressed and .particularly against perspiration derived from the'hands the operator during the transfer stage.

.The presence of the cellulose or solublefor the metallic particles inthe stage of manufacture. The cellulose serves as a medium for` conveying and locating the metallic particles and serves also as a protecting coating for the metallic particles.

Another form of my invention comprises the application of the first layer of heat rei leasable material on the paper carrier and the application of a layer of. bronze or other metallic particles'on the aforesaid first layer of he'at releasable material. Such layer of bronze or other metallic particles 1s prefer- -ablyapplied by means of a brushing machine,'inclu :ling a brush by whichV the metallic particles lare directly brushed on by the sweeping action of the bristles of the brush. Such procedure results in laying on the bronze or other metallic particles with their flat faces substantially parallel to the face of the heat releasable' material. If desired, the brushed on metallic particles may be burnished.

Upon such layer of the metallic particles, I apply bronze or other metallic particles by the procedure set forth hereinabove in respect to my invention illustrated in Fig. 1.

Upon the outer layer of metallic particles,

I apply the outer or second layer of heat releasable material,'similarly as aforesaid.

The sizing layer, wheny desired, is applied asthe outermost layer.

In Fim 2, I have illustrated the morespecific form of my invention. The paper `carrier is indicated at 10, the first heat releasable layer at 11, the brushedfon layer of bronze at 15, the vehiclelapplied layer of metallic particles of bronze at 16, the second or outer layer of heat releasable material at 17 and the sizing layer at 18. y My invention is also a plic'able for the use of the heat transfer medium separate from the paper carrier, which may be manufactured as above set forth andthe heat transfer medium separated from the paper by any suitable means mechanically, or by heat, or otherwise, as mechanically by a knife.'

The layer of heat releasable material between the metallic layer and the outer' sizing layer, during the transfer stage under the condition of the elevated temperature lserves as a medium for locating the metallic particles transferred by the impression operation tothe article impressed. It is appreciated that'such heat releasable layer by reasonvof its resinous content is less fluid duringthe stage of heating than the sizing layer, and thereby .revents undue flow of the transferred portion of the transfer medium. Such control of the fluidity of the transferred portion of the transfer material during the transfer stage is also enhanced vby the cellulose constituent of the metallic layer, namely by its lesser degree of fiuidity at the transfer temperature and its lower co-efficient of heat conduction.

By'such transfer'operation, such layer of heat releasable material disposed theretofor on the transfer roll strip outwardly of the metallic layer becomes disposed between the metallic layer and the article impressed and thus serves as a protecting layer between the article impressed and the metallic particles,

to shield the metallic particles from ally chemical action which might otherwise arise due to the chemicals withy which the material of theV article impressed may have -been .treated or finished.

The layer 'of heat releasable material which on the transfer roll strip is disposed 'between the layer of metallic' particles and' the paper carrier,.by the heat transfer operation becomes disposed outwardly of the metallic particles and serves as a protecting medium in shielding the finished impression from perspiration of the operator encountered in the impression operation and also from moisture and the like incident to the use of the article.

ereas, I have described my invention by .reference to'specific forms thereof, it will be understood that many changes and modifications may be made without depart- `ing from the spirit of the invention.

I claim:

1. metallic transfer medium comprising a carrier, a layer of heat releasable material disposed on a face of said carrier, metallic particles disposed on said layer of heat releasable material and a layer of heat releasable material disposed on said metallic particles.

2. A metallic transfer medium comprising a carrier .of inert material, a layer of metal-v lic particles and heat releasable material-dispgsed on opposite sides of said layer of metallic particles.

3. A metallic transfer medium comprising a carrier, a layer of heat releasable material disposed on a face of said carrier, metallic particles admixed with cellulose disposed on said layer of heat releasable material and a layer of heat releasable material and a layer of heat releasable material disposed on said metallic particles.

4. A metallic transfer medium comprising a carrier of inert material, a layer of metallic particles admixed with cellulose disposed thereon and heat releasable material disposed on opposite sides of said layer of metallic particles.

5. A metallic transfer medium comprising,r a layer of hea-t releasable material, a layer of metallic particles in one `face ot said layer of heat releasable material and a layer ot' heat releasable material disposed on said layer of metallic particles.

6. A metallic transfer medium comprisino a carrier, a layer of heat releasable materia disposed on a face of said carrier, metallic particles disposed on said layer of heat releasable material, a layer of heatreleasable material disposed on said metallic particles and a sizing` on said second-named layer of heat releasable material. 7. A metallic transfer medium comprising a carrier of inert material, a layer of metallic particles, heat releasablc material disposed on opposite sides of said layer of metallic particles and a sizing on said second-named layer of heat releasable material.v

8. A metallic transfer medium comprising a carrier, a. layer of heat releasable material a carrier, a layer of heat releasable material disposed on a face of said carrier, metallic particles disposed-on said layer of heat releasable material, said layer being a plied to locate the metallic particles in su stantially parallel relation of the flat faces and a layer of heat releasable material disposed on said metallic particles.

10. A metallic transfer medium. comprisi ing a carrier, a layer of` heat releasable material ydisposed on a face of said carrier, f

metallic particles disposed on said layer of heat releasable material, said layer being applied to locate the metallic particles in substantially parallel relation of the flat faces, a layer of metallic particles admixed with cellulose disposed on said first-named layer of metallic particles and a layer of heat rcleasable material disposed on said metallic particles.

In testimony whereof I have signed this specification this 18th day of Au ust, 1925.

' WILLIAM F. RUPE. 

